DataFeedFile.com (DFF) Price Comparison Shopping - PHP Client Library API is a software development kit (SDK) or Application Programming Interface (API) to help any webmaster who would like to create a price comparison shopping site create their web site faster using scripts, tools and web services from DFF. DataFeedFile.com (DFF) is an online web services with large product price comparison database. DFF have thousands of online stores data feeds all processed daily ready for price comparison shopping functionality. Affiliates will have direct relationship with affiliate networks such as (Linkshare, Commission Junction, ShareASale, Google Affiliate Network, Perfomics, ebay, shopzilla, etc). DFF have a total of 37 million products from more than 6000+ merchants. Affiliates will earn both CPS (cost per sale) and CPC (cost per click) from using DFF scripts and web services.